Demonstrate the learning object L2806 Fraction fiddle: reach the target to the class and discuss the dynamically linked components.
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A target number is presented (e.g. \(\frac{5}{6}\)) and two fractions that add to that target must be created.
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Make one denominator the same as the target denominator (e.g. sixths) and make the other denominator a factor or multiple of it (e.g. halves, thirds or twelfths).
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Adjust both numerators to create the desired fractions.
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As the fractions change, their fraction bars also change, as does the total on the vertical number line.
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Select <Repeat> and find another pair of fractions for the same total. Select <Next> for a new target number.
Pairs of students work together, taking turns to complete an addition task.
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Ask the students to print out the record sheet and compare solutions.
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Ask what strategies could be used to add fractions like these without the learning object to assist.
Students ready for a greater challenge can be encouraged to make both denominators different from the target fraction.